The Craftsman knife has been developed and adapted to suit the needs of craftsmen, manufactured in Japanese stainless knife steel. A unique method for attaching the sheath around a button on your work clothes means it does not loosen, but is easy to remove. The knife blade is manufactured in 2.5mm stainless steel that has been hardened to 57-59 HRC with the edges sharpened in several stages with a final honing on a leather strop. The handle and sheath are made of extra durable PP plastic.